Brass sump plugs

robinh44 · Post by **robinh44** » 18 Jun 2007 10:40

Hi,

On Sunday I removed my badly mauled brass sump plug using a pin punch to get it off. When I fitted the replacement brass sump plug I noticed the only socket that would fit it was an 11/16", thsi suprised me as I would have expected them to be a metric size. Maybe this explains why they end up rounded off and damaged?

Regards

Robin

SimonM · Post by **SimonM** » 18 Jun 2007 12:54

I've been told the hex is AF size (plumbers kit). The replacement NLM sold me is steel and has a 19mm hex. The original brass plug on mine was well rounded before I got anywhere near it so I couldn't say what size socket would fit.

robinh44 · Post by **robinh44** » 18 Jun 2007 14:41

Simon

Yes it is 11/16 AF, I was just suprised but then realised this could be why so many have been chewed up as the closest metric socket is an 18mm. I also sourced a 1/2" bonded seal washer to use as a good oil tight seal between the plug and the case.

Regards

Robin

3potjohn · Post by **3potjohn** » 19 Jun 2007 05:22

I just did my oil for the 1st time. The sump plug was some kind of steel,rather than brass of a non metric size around 20mm. I had an Imperial socket that did the job.No rubber,copper of fibre washer just a big flange/washer on the plug. Bit gritty so I cleaned the threads . Did oil filter(why does this remind me of our washing machine?)
Once again having a nightmare over correct torque data or lack of it for oil filter cover and sump plug.(too much BMW experience I guess) I did the sump to 28Nm and the oil filter covers to 8Nm but blooming scarey on old alloy.

robinh44 · Post by **robinh44** » 19 Jun 2007 08:24

Hi,

Not that I am currently an authority on torque values, see my thread on flywheel coming off!!, but for whats its worth when I tightened my brass sump plug & oil filter bolts ie steel into ally I tend to use a smaller socket wrench so I limit the amount of torque I can apply. I then tighten more by feel than anything else. Also where oil is concerned I put a thin film of clear silicone on to just plug any annoying oil weeps.

Regards

Robin

3potjohn · Post by **3potjohn** » 20 Jun 2007 07:03

I used fell on my preceeding 8 British bikes by which time I had it about right. Still I am endeavouring to use my trusty Norbar wrench at similar but slightly less settings to equivalent sized bolts he teutonic beast. It's all good fun though.